Cell membrane - Mitosis

Question 1

define mitosis

Answer 1

cell division that produces genetically identical cells

Question 2

what is mitosis needed for ?

Answer 2

cell growth and repair

Question 3

what is interpahse divided into?

Answer 3

3 groups - G1, S, G2

Question 4

what happens in G1?

Answer 4

cell grows and carries out its normal function

Question 5

what happens in the s phase?

Answer 5

DNA replication - each chromosomes becomes double stranded - ATP is stored

Question 6

what happens in the G2?

Answer 6

cell grows and checks for damageand repairs the dna before mitosis

Question 7

what are the four stages of mitosis?

Answer 7

prophase, metaphase, anaphase and telophase

Question 8

what happens in prophase? 3

Answer 8

• the chromosomes condense and become inactive
• centrioles move in pairs to opposite sides of the cell
• nucleus breaks down

Question 9

what happens in metaphase? 2

Answer 9

• spindle fibres attach to the centromere of each chromosome
• chromosomes line up in the middle of the cell

Question 10

what happens in anaphase? 2

Answer 10

• centromeres divide = separating pairs of sister chromatids
• spindle fibres contract = pull the chromatids to opposite sides of the cell = cell elongates

Question 11

what happens in telophase?

Answer 11

• cytokinesis occurs = cytoplasm divides = 2 genetically identical daughter cells
• chromatids form chromosomes